Template:Selected anniversaries/September 20: Difference between revisions
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||1903: Mathematician Frank Nelson Cole famously made a presentation to a meeting of the American Mathematical Society where he identified the factors of the Mersenne number 267 − 1, or M67. Pic. | ||1903: Mathematician Frank Nelson Cole famously made a presentation to a meeting of the American Mathematical Society where he identified the factors of the Mersenne number 267 − 1, or M67. Pic. | ||
||1906: Vera Faddeeva born ... mathematician. | ||1906: Vera Faddeeva born ... mathematician. Faddeeva published some of the first work in the field of linear algebra. Her 1950 work, ''Computational methods of linear algebra'', was widely acclaimed; she won a USSR State Prize for it. | ||
||1906: Sir Philip Stuart Milner-Barry born ... chess player, chess writer, World War II codebreaker and civil servant. He represented England in chess both before and after World War II. He worked at Bletchley Park during World War II, and was head of "Hut 6", a section responsible for deciphering messages which had been encrypted using the German Enigma machine. Pic. | ||1906: Sir Philip Stuart Milner-Barry born ... chess player, chess writer, World War II codebreaker and civil servant. He represented England in chess both before and after World War II. He worked at Bletchley Park during World War II, and was head of "Hut 6", a section responsible for deciphering messages which had been encrypted using the German Enigma machine. Pic. | ||
||1930: Richard Montague born ... mathematician and philosopher. | ||1930: Richard Montague born ... mathematician and philosopher. Pic. | ||
||1939: Andrew Claude de la Cherois Crommelin dies ... astronomer of French and Huguenot descent who was born in Cushendun, County Antrim, Ireland. He worked at the Royal Greenwich Observatory and went on several solar eclipse expeditions. | ||1939: Andrew Claude de la Cherois Crommelin dies ... astronomer of French and Huguenot descent who was born in Cushendun, County Antrim, Ireland. He worked at the Royal Greenwich Observatory and went on several solar eclipse expeditions. | ||
Revision as of 11:41, 29 March 2019
1544: Mathematician and crime-fighter Gerolamo Cardano uses the generating circles of hypocycloids (later named Cardano circles or cardanic circles) to detect and prevent crimes against mathematical constants.
1842: Chemist and physicist James Dewar born. He will invent the vacuum flask, which he will use in conjunction with extensive research into the liquefaction of gases.
1977: A series of celestial events occurs, with sightings reported over a vast territory, from Copenhagen and Helsinki in the west to Vladivostok in the east. It is commonly known as the The Petrozavodsk phenomenon after the city of Petrozavodsk in Russia (then in the Soviet Union), where a glowing object which showered the city with numerous rays was widely reported. The nature of the phenomenon is disputed.
1989: Mathematicians Alice Beta and Paul Erdős co-publish a new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.
1996: Mathematician and academic Paul Erdős dies. He firmly believed mathematics to be a social activity, living an itinerant lifestyle with the sole purpose of writing mathematical papers with other mathematicians.
1997: Signed first edition of Janet Beta at ENIAC sells for five hundred thousand dollars at charity auction to benefit victims of crimes against mathematical constants.
2016: Traveller voted Picture of the Day by the citizens of New Minneapolis, Canada.